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' J. R. SCOTT.

TAKE-UP FOR SEWING MACHINES.

No. 515,252. Patented Fab. 20, 1894.

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J. R. SCOTT. TAKE-UP FOB. SEWING MAUHINES.

No.515, 252. I Patented Feb.20, 1894.'

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JACOB R. SCOTT, OF NEW YORK, N. Y.

TAKE-UP FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 515,252, dated February20, 1894.

Application filed December 29, 1892. Serial No. 456,715. (No model.)

T 00% whom it may concern.-

Be it known that I, JACOB R. SCOTT, a citizen of the United States,residing at NewYork, in the county and State of New York, have inventednew and useful Improvements in Take-Ups for Sewing-Machines, of whichthe following is a specification.

The object of this invention is a take-up mechanism which by acomparatively short movement of the take-up leverserves to draw thestitch tight and to draw out a sufficient quantity of the sewing threadto form a loop which can be drawn through the work by the needle andpassed over the shuttle or bobbin holder which carries the thread forlocking the stitch in a lock-stitch sewing machine.

My take-up mechanism is intended particularly for wax thread sewingmachines such for instance as described in Letters Patent No. 366,935,granted to Christian Dancel July 19, 1887, or in Letters Patent No.497,690, granted to me May 16, 1893, but it can be used with advantagefor other kinds of lock-stitch sewing machines.

In the accompanying drawings Figure 1 represents a perspective View ofthe take-up mechanism detached. Fig. 2 is a front elevation of the same.Fig. 3 is a vertical section in the plane y 'y Fig. 2. Fig. 4t is asectional side elevation of part of awax thread sewing machine embodyingmy invention. Fig. 5 is a transverse vertical section of the tensiondevice in the plane a: 00 Fig. 4:.

In the drawings the letterA designates the take-up lever which ismounted on a stud a. secured in a portion of the frame B and to which anoscillating motion is imparted by a cam or other suitable mechanism in amanner well known to those skilled in the art. In the free end of thelever A is secured a stud b which forms the bearings for two pulleys O Ceach provided with a groove 0 c respectively and which revolve freelyone independent of the other on the stud b. In the frame B is mounted astationary bearing composed as here shown of a studd which supports twopulleys E E. These pulleys rotate freely one independent of the other onthe stud d and they are provided with grooves e e respectively. Thesewing thread T passes from the tension to the take-up mechanism andthence to the work Win the following manner: The branch passes from thetension into the groove 6 of pulley E and over the outside portion ofthis pulley; the branch 11 of the thread passes from the groove etotheinside portion of the groove 0 in pulley O and the branch 12 "of thethread passes from the outside of pulley O to the inside of pulley E andinto the groove 6' of this pulley and the branch 13 of the thread passesfrom the outside of the groove 6 into the inside of groove 0 in pulley Oand the branch 14 runs from the outside of the groove 0' to the work Was seen in Fig. 1. By referring to Fig. 1 it will be seen that in theexample illustrated in this figure the work W rests upon a support I andthe locking thread i is situated above the work, the loopL of the sewingthread being represented in the position which it occupies when it hasbeen partially drawn up by the action of the take-up mechanism.

In Fig.4 I have shown partof a sewingmachine which I have described inmy Patent No. 497,670 above mentioned in which I designates the worktable or support and L is the loop of the sewing thread after the samehas been drawn up through the work by the needle n. This needle issituated above the work support and is actuated as described in PatentNo. 366,935 above mentioned. F is the loop carrier which serves tospread the loop L and to pass the same over the bobbinholder G and afterthe loop has passed over the bobbin holder, it embraces the bobbinthread tas shown in Fig. 1 of the drawings. The sewing thread T is drawnfrom the waxpot II round the tension roller R to the take-up mechanismand this tension roller is exposed to the action of friction disks 1" rwhich can be pressed up against its faces with more or less pressure asshown in Fig. 5. The takeup lever A connects by a link with a lever 26which has its fulcrum on a stud 27fixed in the frame of the machine andwhich carries a roller stud 28 that engages a cam groove 29 in a hubmounted on the main shaft of the sewing machine. WVhen the working partsof the take-up mechanism are in the position shown in Fig. 1, thetake-up leverAmoves in the direction of arrow 1, and since the strand 10of the sewing thread T is held back by the tension R, the strand 14 isdrawn downward and the pulley O which is rotated in the direction inwhich the strand 14 travels, must rotate in the direction of arrow 2,the strand 13 moves in the direction of arrow 4 and the strand 12 in thedirection of arrow 6, so that the pulley E turns in the direction ofarrow 5 and the strand 11 which connects with the strand 10 of thesewing thread remains stationary. At the same time as the pulleys O 0move downward, all the strands 11, 12, 13 and 14 must be elongated andsince the thread required for this purpose must come from the strand 14,a downward motion of the leverA for one quarter inch requires one inchthread. Consequently by a comparatively small down- Ward motion of thelever A the loop L is drawn up tight and as the downward motion of thelever A continues, after the stitch has been drawn tight, a suffioientquantity of the sewing thread is drawn out from the waxpot H (thefriction of the tension roller being overcome by the lever A) to enablethe needle n to draw the sewing thread up through the work and to formthe loop L (Fig. 4), and when the loop carrier F enters this loop anddraws it over the bobbin holder G, the lever A is 1 carried up by itscam in the manner illustrated in Patent No. 366,935 above mentioned sothat the pulley 0 comes nearly in contact with the pulley E. From thisdescription it will be understood that all the thread required for eachstitch is drawn out of the waxpot by the action of the leverAand thestitch forming devices have not to overcomethe resistance of thetension, neither have they anything to do with the operation of drawingthe stitches tight. It will also be seen that while the pulley E remainsstationary during the downward movement of the pulleys O C, each of thepulleys E, O, O rotates but the pulley O rotates faster than the pulleyE and this pulley E rotates faster than the pulley Oand for this reasonit is desirable to mount the pulleys E E and O O in such a manner thatthey can rotate oneindependent of the other.

What I claim as new, and desire to secur by Letters Patent, is

The combination with stitch-forming devices, a tension device, a pivotedtake-up lever, and means for actuating the lever, of a stationarybearing d carrying two independently rotatable pulleys E and each havinga peripheral groove, and a stud b mounted on the free end of the take-uplever and carrying two independently rotatable pulleys O and G eachhaving a peripheral groove, substantially as and for the purposesdescribed.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JACOB R. SCOTT. Witnesses:

WM. 0. HAUFF, E. F. KASTENHUBER.

